Coherence of Oscillations Generated by Single Electronic Circuits

Several single electronic circuits have been proposed as candidate frequency generation sources. The quality of oscillations and their stability should be carefully assessed. This paper studies the coherence of the signals. The Monte-Carlo technique is used to compute the distribution of time between tunnel events and then calculate the frequency dependent power spectral density of the resulting oscillations. It is shown that longer arrays perform better than the short arrays and the quality of oscillations varies with the applied voltages. The quality of oscillations could be improved by the proper choice of the components of the circuit.